/*
 * Copyright (c) 2008-2023, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.hazelcast.internal.config.override;

import java.util.Collections;
import java.util.Map;

/**
 * A {@link ConfigProvider} extracting config entries from environment variables.
 */
class EnvConfigProvider implements ConfigProvider {

    private final EnvVariablesConfigParser envVariablesConfigParser;
    private final Map<String, String> envVariables;

    EnvConfigProvider(EnvVariablesConfigParser envVariablesConfigParser, Map<String, String> envVariables) {
        this.envVariablesConfigParser = envVariablesConfigParser;
        this.envVariables = envVariables;
    }

    @Override
    public Map<String, String> properties() {
        return Collections.unmodifiableMap(envVariablesConfigParser.parse(envVariables));
    }

    @Override
    public String name() {
        return "environment variables";
    }
}
